+———Joshua B. CLARK
      |
  +———James A. CLARK (1864 – )
  |   |    
  |   +———Frances DALEY
  |    
  Elizabeth CLARK (29 Nov 1902 Carleton, Ontario, Canada – )
  |                
  |           +———William CAVANAGH (1759 Tipperary, Ireland – abt 1819 Tipperary, Ireland)
  |           |
  |       +———John CAVANAGH (1796 Tipperary, Ireland – 11 May 1883 Huntley, Carleton Co, Ontario, Canada)
  |       |   |    
  |       |   +———Elizabeth “Eliza” DONNELLY (abt 1769 Tipperary, Ireland – abt 1829 Tipperary, Ireland)
  |       |
  |   +———John CAVANAGH (1 Apr 1832 Huntley, Ontario, Canada – 26 Jan 1909 Huntley, Ontario, Canada)
  |   |   |        
  |   |   |   +———Michael RIVINGTON (1777 Cloghjordan, Tipperary, Ireland – bef 1852 Huntley, Ontario, Canada)
  |   |   |   |
  |   |   +———Jane B. RIVINGTON (1798 Tipperary, Ireland – 11 Apr 1880 Huntley, Ontario, Canada)
  |   |       |    
  |   |       +———Catherine GEHMAN (abt 1777 Tipperary, Ireland – 2 Jun 1864 Huntley, Ontario, Canada)
  |   |
  +———Mary Elizabeth CAVANAGH (1869 – )
      |    
      +———Elizabeth MULLIGAN (12 Jul 1838 Carleton Co, Ontario, Canada – 1915 Huntley, Ontario, Canada)